When using a LODE setup, LODE_HOME must be defined in the environment
but setting LODE_HOME/opt/bin in the PATH is optional
and really only necessary as a convinience to get the right
'make' in the PATH.
configure.ac has code do deal with the absence of LODE_HOME/opt/bin
in the PATH but autogen.sh did not hence was failing in this
case, not finding aclocal.

Change-Id: I7a4449504dc539bb055798a6e1aea5268c5fb046
Reviewed-on: https://gerrit.libreoffice.org/21003Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Norbert Thiebaud <nthiebaud@gmail.com>